Cylinder construction for multiple-piston engines.



K. STEINBECKER.

CYLINDER ooNsTRUcTloN FOR MULTIPLE PlsToN ENGINES.

APPLICATION FILED AUG-7,19l2.

Patented Oct. 19, 1915.

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Witnesses K. STEINBECKER.

CYLINDER coNsTRuCTloN FOR MULTIPLE PISTONENGlNES.

APPLICATION FILED AUGJ. 1912,

Patented Oct'. 19, 1915.

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Witnesses KARL STEINBECKER, F CHAELOTTENBURG, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

CYLXNDER CONSTRUCTION FOR MULTIPLE-PISTON ENGINES.

Specication of Letters Patent.

Patented Oct. 19, 191.5.

Application filed August 7, 1912... Serial No. 713,749.

' Charlottenburg, Germany, have invented certain new and useful Improvements in Cylinder Construction for Multiple-Piston Engines, of which the following is a specication. l

This invention relates to internal combustion engines, and especially to those in which there are two pistons working in opposite directions in the Asame cylinder.

The object of the invention is to enable a free expansion` of the cylinder to take place, so as to avoid strains and warping.

Moreover, the invention simplifies the construction and assembling of the engine and improves its operation.

To accomplish these results, the cylinder is made in one piece and is attached to the engine frame at a point outside of the zone of combustion, so far as this is possible, as hereinafter set forth more at length and. as shown in the accompanying drawings, in wliich- Figure l is a longitudinal section of a cylinder and frame embodying my improvements; and Fig. 2 is a modification of the saine. l

ln the examples selected the cylinder 1 is arranged with its axis vertical, but this is immaterial, as the invention is applicable to horizontal engines. The pistons are not shown, but it will bereadily understood by those skilled in the art. that there are two pistons, one iii each end portion of the cylinder, and so connected to the crank shaft as to reciprocate in opposite directions simultaneously. The pistons control the inlet ports 2 for thesupply of scavenging air and charging air, and the ports 3 for carrying off the waste gases. The fuel is admitted to the combustion chamber 4, which lies be tween the ports 2 and 3, through injection devices, not shown, which are'inserted at 5. The lower portion of the cylinder passes through a box-like frame 6 in which is a jacket 7 preferably integral with said frame and concentric with the cylinder, forming a space 8 for a cooling medium. The walls of this jacket are provided with nozzles 9 which register with the air inlet ports 2, and make a Huid-tight joint'with the exterior of the cylinder at that point. Mounted upon the frame, but preferably not integral therewith, lis a tubular stool or jacket l0, concentric with tli'e cylinder and (in Fig. l) having at its upper end a suitable surface to receive a flange l1 on the cylinder by which said cylinder is supported. This flange is located above the horizontal plane of the eX- haust ports 3, so that it is outside of the zone of combustion defined by the combustion chamber 4. The jacket 10 has nozzles l2 registering with the exhaust ports 3 and making a tluid-tight joint with the cylinder at that point. It is also provided with openings 13 for the fuel injection devices mentioned above.

ln Fig. 2, the upper portion of the cylinder is provided with a cooling jacket 14: preferably cast integral with. the cylinder and with the jacket l0, so that in this modification there are but tivo parts, to wit, the cylinder withits j ackets l0, ll and the frame with its jacket 7. The spaces l5 for the cooling medium in the jackets l0 and 14 are in communication by passages through the bridge pieces lo between the exhaust portsS.

The invention otl'ers, over the constructions heretofore known. advantages as rcgards casting and engineering. rl"he employment of'a working cylinder made in one piece, in the sense of the invention', permits the engine body to be composed of a few parts which may be rast without any ldiiiiculty, and permitJ the engine to be set up without jarring. The advantage from an engineering standpoint consists principally in the fact that the cylinder walls, at the places which are most exposed to the heat of combustion, hawl no dividing joint which can ne kept tight only with great ditliculty on account of incomplete cooling. rlhe new ymethod of construction permits, furthermore, a free expansion of the cylinder both ways from its supporting flange` and quite independently of its cooling jackets, so that the strains in the engine body, in a cycle of operation` may completely equalize themselves. ing jacket 10 with the cylinder at one end only obviates the diilculties which result from the 'employment of cooling jackets which arc cast solid with the cylinder at both ends, by reason of the disturbing effects of the strains always contained in such a casting.

It is evident that the cylirler may be supported at some other point than at the place The connection of the central coolllOv where 'the flange 11 i's shown, but it is not recommended to locate the place of support Within the Zone of combustion, on account of the interference with the cooling eliect. `When located elsewhere than as shown in the drawings, the jackets would have to be slightly mod'ii'ed to suit the changed conditions.

In accordance with the provisions of the .patent statutes, I have described the principle of ope-ration of my invention, together gwith the apparatus which l now consider to represent the best embodiment thereof; but l desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other meansm W hat l claim as new and desire to secure by Letters Patent of the United States, is,-

l. An internal combustion engine having a one piece cylinder adapted for use with two opposi'tely moving pistons. a frame in which said cylinder has a sliding lit, and

means carried by the. frame forming a water jacket for the cylinder and also a support for supporting said cylinder at a single point beyond the zone of combustion, whereby said cylinder is free to expand longitudinally throrgh the frame Without getting outl ot' alineinenwt.

An internal combustion engine having a one piece cylinder for use with two oppositelymoving pistons, a trame'in which said cylinder "has sliding tit, y' and a cooling jacket surrouniihng the Zone of combustion oi said cylinder, and attached to said cylinder beyond the zone of combustion.

An internal combustion engine having a cylindt-ar adapted for use with two oppo sitely-moving pistons, a rame,`and a jacket ganoui'ited on tha'frljt'ranie, said jacket surrounding the cylinder and suppoiftlng it only at one end.

4 el, An internal combustion engine having mamas a. one piece cylinder adapted toruse-'With Witwe oppositely-moving pistons, av frame, a "'jjacket rising above the frame, and a flange on the cylinder resting on the upper end of the jacket and affording the cylinder its sole support,

5. An internal combustion engine having a cylinder adapted for use with two oppositely-moving pistons, a rame,a jacket rising above the frame and surrounding the combustion chamber of the cylinder, a tlange on the cylinder resting on the upper end of the acket and ailiording the cylinder its sole support and a jacket in said frame surrounding the lower portion of the cylinder.

G. ln an internal combustion engine, the combination of a receiver having openings in its opposite Walls and a cylinder with an inner wall mounted in said openings'and surrounded by a jacket which is mounted on one of the Walls of the receiver, there being also Wall surrounding the portion of said inner Wall Within the receiver and serving as a jacket thereabout, said latter jacket communicating with the irstmentioned one through the opening in the receiver wall which supports the first-mentioned acket.

7. The combination of a receiver having openings in. itsopposite Walls, a jacket mounted on oned-fsaid wallsi and a cylinder mounted in said jacke "in said openings, said cylinder being secured to said jacket at the end thereof remote from the receiver and entirely outside the Zone of combustion and being restrained from movement in its longitudinal direction `with reference to said jacket and said receiver only where so secured. 1 Y

ln witness whereof, have hereunto set my hand this eighteenth 4dav of July, 1912. KARL STEINBECKER.

lWitnesses HENRY HAsrnn, VVOLDEMAR HAUPT. 

